Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.
Polio, although it is eradicated in the United States, it continues elsewhere and is able to be
Polio, although eradicated in the United States, it still continues elsewhere and can be
Although still continuing elsewhere, polio has been eradicated in the United States and could be
Although having been eradicated in the United States, polio still continues elsewhere and is capable of being
Although eradicated in the United States, polio continues elsewhere and could be
although后面可以加形容词短语/-ing短语/-ed短语,但是要符合状语从句省略的要求。
1. 状语从句的逻辑主语等于句子主语;
2. 从句的谓语动词是必须是be。
(没要求主句的谓语动词必须是be;换句话来说,状从的省略可以看成是省略了be,且从句主语和谓语be要么同省要么同留。)
-----kmf
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